Simplify:
$[{5 x - (x + 3 y)} - {x + (2 x - y)}]$

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Solution

$[{5 x - (x + 3 y)} - {x + (2 x - y)}]$
$= [{5 x - x - 3 y} - {x + 2 x - y}]$
$= [{4 x - 3 y} - {3 x - y}]$
$= 4 x - 3 y - 3 x + y$
$= x - 2 y$ .

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Now can’t you simplify these?

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(iv) (x − y) + (x − y)

Try simplifying these:

(i) (3x + 2y) − (x + y)

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\frac{3 y (x - y) - 2 x (y - 2 x)}{7 x (x - y) - 3 (x^{2} {- y}^{2})}

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